This antique Japanese Katana is attributed to Mito Sukemitsu, an active swordsmith during the late Edo period (1854-1865). The blade measures 72.9 cm in cutting edge length with a curvature of 1.7 cm. It comes with an NBTHK Hozon Certificate, koshirae mounting, and a shirasaya case.
mumei · Osafune Yokoyama · Ansei (1854-1860) · nagasa 72.9cm · sori 1.7cm




















Hitachi · around 1854-1860
Fujishiro Chu saku · Tōken Taikan top 95%
1 piece on the market now
Certifies a genuine blade worth preserving: a signature confirmed correct, or, if unsigned, an era, province, and school that the NBTHK can reliably identify.
The NBTHK (Nihon Bijutsu Tōken Hozon Kyōkai, the Society for the Preservation of Japanese Art Swords) is a public-interest incorporated foundation founded in 1948 and supervised by Japan’s Agency for Cultural Affairs (Bunkachō); it is based at the Japanese Sword Museum in Tokyo. Its expert panels physically examine each submitted work (shinsa) and issue a certificate (kanteishō) ranking it by artistic and historical merit. NBTHK papers are the most widely recognized standard of authentication for Japanese swords and fittings.
NBTHK official siteReturns/exchanges limited to defects caused by shipping (except willful misconduct or gross negligence by the company); customers must contact within 72 hours of receiving the product.
This antique Japanese Katana is attributed to Mito Sukemitsu, an active swordsmith during the late Edo period (1854-1865). The blade measures 72.9 cm in cutting edge length with a curvature of 1.7 cm. It comes with an NBTHK Hozon Certificate, koshirae mounting, and a shirasaya case.
mumei · Osafune Yokoyama · Ansei (1854-1860) · nagasa 72.9cm · sori 1.7cm




















Hitachi · around 1854-1860
Fujishiro Chu saku · Tōken Taikan top 95%
1 piece on the market now
Certifies a genuine blade worth preserving: a signature confirmed correct, or, if unsigned, an era, province, and school that the NBTHK can reliably identify.
The NBTHK (Nihon Bijutsu Tōken Hozon Kyōkai, the Society for the Preservation of Japanese Art Swords) is a public-interest incorporated foundation founded in 1948 and supervised by Japan’s Agency for Cultural Affairs (Bunkachō); it is based at the Japanese Sword Museum in Tokyo. Its expert panels physically examine each submitted work (shinsa) and issue a certificate (kanteishō) ranking it by artistic and historical merit. NBTHK papers are the most widely recognized standard of authentication for Japanese swords and fittings.
NBTHK official siteReturns/exchanges limited to defects caused by shipping (except willful misconduct or gross negligence by the company); customers must contact within 72 hours of receiving the product.